/*
 * Copyright (c) 2020, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * *  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * *  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "ti_msp_dl_config.h"

int main(void) {
  // 初始化系统配置，这是程序运行前的必要设置
  SYSCFG_DL_init();

  // 启用定时器0的中断，允许定时器0在计数完成时触发中断
  NVIC_EnableIRQ(TIMER_0_INST_INT_IRQN);

  // 配置系统控制，使能在退出中断时进入睡眠模式，以降低功耗
  DL_SYSCTL_enableSleepOnExit();

  // 启动定时器0的计数器，开始计数
  DL_TimerA_startCounter(TIMER_0_INST);

  // 无限循环，使程序持续运行
  while (1) {
    // 等待中断，进入低功耗模式直到下一次中断发生
    __WFI();
  }
}

void TIMER_0_INST_IRQHandler(void) {
  switch (DL_TimerA_getPendingInterrupt(TIMER_0_INST)) {
  case DL_TIMERA_IIDX_ZERO:
    DL_GPIO_togglePins(GPIO_GRP_0_PORT, GPIO_GRP_0_LED_PIN_22_PIN);
  default:
    break;
  }
}
